I think there is something made by Antique Sound Labs that uses the 845 tube single ended for about 22 watts per channel. A friend uses one to drive his Silverlines.
Recommendations for tube amp to replace Plinius
I am driving a pair of Legacy Focus speakers with a Plinius 100 mk3. The Focus speakers have an impedance of 4 okms and a sensitivity of 96db. As such the speakers may be a good match for a tube amp. Any recommendations for a tube amp in the $2500.00 used market range? The rest of my system consists of the Placette passive pre-amp and a Cary 306/200 cd.
15 responses Add your response
Being there with Plinius 100 mk3. Went with Mesa Baron, and Dynaudio Countour 3.3, and went back to Plinius! Plinius is fantastic amp, especialy in class A operation. What would you like to achieve with changing of the amps? I gained little bit deeper soundstage, and more liquid midrange, bass was good too, but not as good as with Plinius. I would look into better tube pre-amp, before i ditch Plinius. If you want tube sound, try Pass Aleph amps! |
I have a pair of Focus 20/20 and use the EAR 534. It is 50 wpc and has rca/balanced inputs and also individual gain controls for each channel. It is a beautiful amp with a chrome front. It is also relatively maintenance free as tube amps go. It can also be mono. I have two of these amps and really only need one to drive these speakers. It retails for $3595 and I would sell you one of them for 1850 shipped. |
In my opinion, you are not going to be able to move three 12" (or are they 14", I don't remember) woofers very well with a low powered tube amp. You won't get a whole lot of bass out of them, as they require tons of current. I lived with the Focus since 1990, and have just recently replaced them. I was very close to getting a Manley Stingray for them, until I heard the two together. Thin, but great midrange. |
Thanks for your feedback. 1markr makes a good point about the current needed to drive the woofers. I guess I don't understand the practical application of the sensitivity rating. I've never heard the Plinius 102. The Plinius is a great amp, very pristine and good across the whole spectral range(highs to lows) but at times I feel its too analytical and I was hoping a tube amp would romanticize my system a bit. I think the real issue is my fascination with the low powered set and triodes. even though I've never heard them, I feel I'm missing out on something. |
Unless you want to be a guinea pig, I think the best advice is for you to poll Legacy Focus users for what amps work best with these speakers. Use a subject line like "Best amp for Legacy Focus loudspeakers?". I think you would probably like the amps I am using, Atma-Sphere M-60's, but the 4 ohm impedance of your loudspeaker requires the use of a product called the ZERO autoformer to achieve good results. Paul Speltz, ZERO designer, would be a good source of information. His email address is listed at the ZERO site. The ZERO's can replace your speaker cabling. Used M-60's and new ZERO's will cost about $2,500-$3,000. Another excellent resources is the Atma-Sphere Owner's Group, obviously a site dedicated to Atma-Sphere products, but they will discuss other brands as well. There are a number of technically savvy users there that will give you good advice. |
I have owned the Plinius SA-100 and now the SA-102. I have tried a number of tube amps but have felt the lack of dynamics and impact is too much loss. Please look up my review of the SA-102 here at Audiogon, I use it with a Placette active pre-amp, Sony SCD-1 and Dunlavy IVa speakers and am extremely happy. Major improvement over the SA-100, much more liquid and naturual while keeping the dynamics. Hi Wellfed, sorry I missed you last time you where in town. |
I owned Focus speakers for many years. I agree with the assessment that they need alot of current especially since the impedance drops to 2.7 in the mid-bass. Consider the Spectron Musician amp. It is class D and doesn't sound like traditional solid state but can provide plenty of current. Enjoy listening. |
I never liked the SA100 MkIII. Took it home a few times but my tube monos always played better music. Then I heard the SA102. Murdered the tube monos on 75% of the music, with the tube monos only being better on maybe 10% of the music. At that hit rate I now have the SA102 and I can't see myself changing it for a while. The 102 is not an updated SA100 - it is quite a different amp. You have used the word analytical to describe the SA100. I always thought the SA100 mechanical - perhaps we mean the same thing. By comparison the SA102 is very organic. It does not romanticise, but the problem I find with gear that romanticises is that it only really works with a narrow range of music. |